Selection of CNC machining tools

When selecting a CNC tool, the size of the tool must be compatible with the surface size of the workpiece being processed. In production, end mills are often used to process the peripheral contours of flat parts; when milling flat surfaces, carbide blade milling cutters should be selected; when processing bosses and grooves Choose a high-speed steel end mill; when processing the rough surface or roughing the hole, you can choose a corn milling cutter with a carbide blade,for processing some three-dimensional surfaces and variable bevel contours, ball-end milling cutters, Ring, cone and disc milling cutters  When performing free-form surface processing, since the cutting speed of the end of the ball-head tool is zero, the cutting line spacing is generally very dense to ensure machining accuracy, so the ball-head is often used for the finishing of curved surfaces. The flat-end cutter is superior to the ball-end cutter in terms of surface processing quality and cutting efficiency. Therefore, as long as the cut is ensured, the flat-end cutter should be given priority whether it is rough machining or finishing of curved surfaces. In addition, the durability and accuracy of the tool are closely related to the price of the tool. It must be noted that in most cases, although choosing a good tool increases the cost of the tool, the resulting improvement in processing quality and processing efficiency , the entire processing cost can be greatly reduced.

In economical CNC machining, since the sharpening, measurement and replacement of tools are mostly done manually, which takes a long time, the arrangement of the tools must be reasonably arranged. Generally, the following principles should be followed:

① Reduce the number of tools as much as possible;

② After a tool is clamped, all processing parts it can perform should be completed;

③ Tools for roughing and finishing should be used separately, even if they are tools of the same size;

④ Mill first and then drill;

⑤ Carry out surface finishing first, and then perform two-dimensional contour finishing;

⑥ When possible, the automatic tool changing function of CNC machine tools should be used as much as possible to improve production efficiency, etc.